초록
상엽의 수확고를 측정하기 위하여 상엽의 수량과 높음 상관관계가 있는 형질중 상전에서 쉽게 측정할수 있는 기조장(X$_1$), 기조직경(X$_2$), 엽수(X$_3$), 엽면적(X$_4$)의 4 개형질을 측정하여 이들 형질의 수량에 영향하는 가중치를 다중회분방정식에 의하여 계출하여 수량을 측정할수 있도록 여러가지 식을 유도하였다. 1. 기조장(X$_1$)과 기조직경(X$_2$)을 측정하여 수량을 측정하기 위하여는 개량서반에 었어서는 y$_1$v$_1$＝-115.760＋0.068X$_1$＋165.756X$_2$(g) 일지뢰에 있어서는 y$_1$v$_2$＝-221.500＋1.768X$_1$＋38.152X$_2$(g) 노상에 있어서는 y$_1$v$_3$＝-253.826-0.116X$_1$＋289.507X$_2$(g) 수원상 4호에 있어서는 y$_1$v$_4$＝ -157.559＋1.063X$_1$＋106.088X$_2$(g)의 식에 의해서 기조장(X$_1$)과 기조직경(X$_2$)의 측정치를 대입하면 수량을 견적할수 있다. 2. 기조장(X$_1$), 기조직경(X$_2$), 엽수(X$_3$)의 3 개형질을 측정하여 수량을 견적하는 데는 각품종별로 각각 y$_{7}$v$_1$＝-118.478-0.665X$_1$＋184.445X$_2$＋2.346X$_3$ y$_{7}$v$_2$＝-217.432＋2.062X$_1$＋35.668X$_2$-1.058X$_3$ y$_{7}$v$_3$＝-206. 249-0.739X$_1$＋268.08X$_2$＋2.770X$_3$ y$_{7}$v$_4$＝-153.383＋0.009X$_1$＋2.024X$_2$＋0.171X$_3$ 의 식에 의하여 수량을 견적할수 있다. 3. 기조장(X$_1$), 기조직경(X$_2$), 엽수(X$_3$), 엽면적(X$_4$)의 4개형질을 측정하고 수량을 견적하기 위하여는 각품종별로 각각 y$_{11}$v$_1$＝82. 567-1.283X$_1$＋15.501X$_2$＋0.640X$_3$＋3.511X$_4$ y$_{11}$v$_2$＝136.411＋0.311X$_1$＋1.921X$_2$-0. 217X$_3$＋0.214X$_4$ y$_{11}$v$_3$＝150.2Z7-0.139X$_1$＋11.788X$_2$＋0.143X$_3$＋0.381X$_4$ y$_{11}$v$_4$＝160.850＋0.323X$_1$＋66.076X$_2$-0.794X$_3$＋2..614X$_4$등의 식에 의하여 수량을 견적할수 있다.의하여 수량을 견적할수 있다.
Various formulae for estimation of leaf production in mulberry trees were investigated and obtained. Four varieties of mulberry trees were used as the materials, and four characters. namely branch length (X, 1). branch diameter (X, 2). leaf number per branch (X, 3), and leaf area per branch (X, 4). were studies. The formulae to eatimate the leaf yield of mulberry trees are as follows: 1. Y$_1$v$_1$＝-115.760＋0.068X$_1$＋165.756X$_2$ Y$_1$v$_2$＝-221.500＋1.768X$_1$＋38.152X$_2$ Y$_1$v$_3$＝-253.826-0.116X$_1$＋289.507X$_2$ Y$_1$v$_4$＝ -157.559＋1.063X$_1$＋106.088X$_2$ where Y$_1$v$_1$, Y$_1$v$_2$, Y$_1$v$_3$, Y$_1$v$_4$, are showed the estimated yield of the each variety, namely Gaeryang souban, Ilchirye, Nosang. and Suwon Sang No. 4, respectively. X$_1$ and X$_2$ denote the measured values of branch length and branch diameter, respectively. 2. Y$\sub$7/v$_1$＝-118.478-0.665X$_1$＋184.445X$_2$＋2.346X$_3$ Y$\sub$7/v$_2$＝-217.432＋2.062X$_1$＋35.668X$_2$-1.058X$_3$ Y$\sub$7/v$_3$＝-206. 249-0.739X$_1$＋268.08X$_2$＋2.770X$_3$ Y$\sub$7/v$_4$＝-153.383＋0.009X$_1$＋2.024X$_2$＋0.171X$_3$where Y$\sub$7/v$_1$, Y$\sub$7/v$_2$, Y$\sub$7/v$_3$, Y$\sub$7/v$_4$, are the estimated yield of the each variety, namely Gaeryang. Souban, Ilichirye, Nosang, and Suwon Sang No. 4, respectively. X$_1$, X$_2$, X$_3$, denote the measured values of each character. branch length, branch diameter and leaf number per branch, respectively. 3. Y$\sub$11/v$_1$＝82. 567-1.283X$_1$＋15.501X$_2$＋0.640X$_3$＋3.511X$_4$ Y$\sub$11/v$_2$＝136.411＋0.311X$_1$＋1.921X$_2$-0. 217X$_3$＋0.214X$_4$ Y$\sub$11/v$_3$＝150.2Z7-0.139X$_1$＋11.788X$_2$＋0.143X$_3$＋0.381X$_4$ Y$\sub$11/v$_4$＝160.850＋0.323X$_1$＋66.076X$_2$-0.794X$_3$＋2..614X$_4$ where Y$\sub$11/v$_1$, Y$\sub$11/v$_2$, Y$\sub$11/v$_3$, Y$\sub$11/v$_4$, are the estimated yield values of four varieties, and X$_1$, X$_2$, X$_3$, X$_4$ denote the measured values of four characters. namely branch length, branch diameter. leaf number per branch and leaf area per branch. respectively. The estimation method of mulberry leaf yield by measurement of some characters, branch length. branch diameter. leaf number per branch and leaf area per branch. could be the better method to determine the leaf yield of mulberry trees without destroying the leaves and without weighting the leaves of mulberry trees than the other methods.